Author Affiliations
Abstract
1 College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China
2 First People’s Hospital of Changzhou, Changzhou 213000, China
3 Centre for THz Research, China Jiliang University, Hangzhou 310018, China
4 Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, China
5 e-mail: gmpan@cjlu.edu.cn
6 e-mail: zjyang@csu.edu.cn
The interaction between magnetic quantum emitters and the local electromagnetic environment is a promising method to manipulate the spontaneous emission. However, it is severely limited by the weak interactions between the magnetic component of light and natural materials. Herein, we demonstrate that the special type of anapole states associated with the “onefold” electric toroidal dipole moment can be excited by efficient interaction between magnetic dipole emitters and silver oligomers. Based on magnetic anapole states, the radiative power is effectively suppressed with significant coupling between the emitter and the silver nonamer, physically providing an ideal playground for the study of non-radiative transitions. These findings not only introduce magnetic anapoles to plasmonics but also open a door for the development of new high-performance magnetic-dipole-based optoelectronic devices.
Photonics Research
2022, 10(9): 2032
Author Affiliations
Abstract
Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China
Here we study theoretically the optical responses of hybrid structures composed of dielectric nanostructures and quantum emitters with magnetic dipole transitions. Coherent couplings between magnetic dipole transitions and magnetic modes can occur, leading to giant modifications of the extinction spectra of the constituents in the hybrid structures. For a given hybrid structure, the extinction-cross-section spectra show linear or nonlinear behaviors depending on the strength of the excitation field. For a weak excitation, the extinction of the quantum emitters is greatly enhanced. The hybrid structure shows a dip on its extinction spectrum. For a strong excitation, the resonant extinction of the quantum emitters is weakly enhanced while the extinction spectrum is broadened obviously. The hybrid structure shows a Fano-like line shape on its extinction spectrum, which is different from that with a weak excitation. This difference is highly related to the behaviors of the magnetic polarizabilities of the quantum emitters in the hybrid structure. The optical responses of hybrid structures can be largely tuned by varying the geometric and material parameters.
Photonics Research
2019, 7(10): 10001142
成都理工大学核技术与自动化工程学院, 四川 成都610059
论述了便携式能量色散X射线荧光分析仪在土壤重金属元素镍测定过程中, 基体效应对测量结果的影响, 提出以样品散射的X管的标识靶线（钨靶Lα1线）作为比较标准的特散比校正模型, 并在此基础上结合吸收元素校正法对基体效应进行校正, 以此建立的含量预测模型, 相关系数为0.999, 剩余标准差为2.541。 利用该模型对土壤标样中镍含量进行测量, 与标准值比较, 其平均相对误差为3.90%, 且精确度较高。
能量色散X射线荧光分析 基体效应 含量预测 土壤 镍 Energy dispersive X-ray fluorescence analysis Matrix effect Content prediction Soil Nickel 光谱学与光谱分析
2013, 33(8): 2242
